Rear & Side Extensions
Single or double-storey additions that connect seamlessly to your existing structure — kitchen breakouts, garden rooms, utility annexes.
House Extensions & Renovation — United Kingdom
Your home, built around how you actually live
Kestrelfield Home Improvements plans, manages, and delivers extensions and renovations with itemised quotes, a named project lead, and trades who show up on time — from the first site visit to the final snag.
Get your free quote
Most renovation projects go wrong before they begin
Vague estimates that balloon mid-build. Subcontractors who disappear after week two. No clear contact when questions arise. These are the patterns that make homeowners hesitant — and rightly so.
How we work differently
Every Kestrelfield project is scoped line-by-line before a contract is signed. You receive a named project manager, a written programme of works, and weekly progress updates. Nothing starts on site until you have approved the full plan in writing.
What we build
From a rear kitchen extension to a whole-house renovation, every project is scoped, managed, and delivered by Kestrelfield Home Improvements with the same process rigour.
Loft Conversions
Dormers, hip-to-gable, and Velux conversions that add a full bedroom and bathroom without touching your garden boundary.
Full Home Renovation
Structural reconfiguration, new joinery, replastering, rewiring, plumbing, and decoration — a single contract, one point of contact.
Garage & Outbuilding Conversion
Habitable rooms, home offices, and annexes from underused structures — insulation, DPC, windows, and electrics included.
Structural Refurbishment
Underpinning, beam installation, wall removal, and damp remediation — properly specified by a structural engineer, not guessed at.
Planning & Project Management
Drawings, planning applications, Building Regulations submissions, and on-site management — available as a standalone service or bundled with build.
Four stages from enquiry to handover
A clear process means no surprises. Here is exactly how every Kestrelfield project runs.
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Site visit & scoping
A senior Kestrelfield surveyor visits your property, takes measurements, assesses structural constraints, and listens to how you actually use the space. No pressure, no sales pitch — just information gathering.
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Itemised quote & programme
You receive a line-by-line breakdown — trade by trade, material by material — alongside a phased programme of works with start and completion dates. Nothing is bundled into vague lump sums.
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Build & weekly reporting
Your named project manager runs the site, coordinates all trades, and sends you a written update every Friday. You have a direct line for any questions — not a general enquiries inbox.
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Snagging & sign-off
Before we call a project complete, we walk through every finish with you and work through a written snag list. Building Regulations sign-off documents and warranties are handed to you on the final day.
Built on transparency, not promises
Written variation control
No verbal agreements on changes. Every scope variation is issued as a written change order with cost and programme impact before any additional work begins.
Building Regulations compliance
All structural, electrical, and plumbing work is carried out to current UK Building Regulations. Completion certificates are your property, not ours to retain.
Realistic timelines, kept
We build contingency into programmes honestly rather than quoting short to win work. If a delay occurs for reasons outside our control, we tell you immediately and revise the programme in writing.
Named trades, not agency labour
The same carpenters, plasterers, and electricians work through from start to finish. You know who is in your home and they know your project inside out.
What homeowners say
“The itemised quote was the thing that convinced us. We could see exactly what we were paying for — right down to the lintel spec and the number of coats of plaster. No other contractor came close on transparency.”
“Friday updates. Every single week. I always knew what had been done and what was next. That level of communication is rare.”
“The snagging walk-through at the end was thorough — they found things I had not even noticed. Every item was resolved before I signed off.”
Extensions and renovations that add real living space — and real long-term value to your property.
Request a free site visitCommon questions
- What types of house extensions does Kestrelfield Home Improvements handle?
- We handle single-storey rear and side extensions, double-storey additions, wrap-around extensions, loft conversions, and garage conversions. Every project starts with a site visit so we can assess what works best for your property.
- Do I need planning permission for a house extension?
- Many single-storey extensions fall within Permitted Development rights and do not require full planning permission. Larger or more complex projects usually need a planning application. We walk you through the requirements during your initial consultation at no charge.
- How long does a typical home renovation or extension take?
- A standard single-storey rear extension typically takes eight to fourteen weeks on site once foundations are in. Full renovation projects are scoped individually. We provide a detailed programme of works before any contract is signed.
- How does Kestrelfield Home Improvements price its work?
- We provide itemised quotations broken down by trade, materials, and labour so you know exactly what you are paying for. There are no hidden preliminaries or vague contingency lines. If scope changes, we issue a written variation before any additional work begins.
- What areas does Kestrelfield Home Improvements cover?
- We operate across the United Kingdom. Contact us with your postcode and we will confirm coverage and arrange an initial site visit.
Get your free, no-obligation quote
Tell us about your project and a Kestrelfield surveyor will contact you to arrange a site visit — no sales pressure, just a clear picture of what your extension or renovation will involve and cost.
- Free site visit included
- Itemised quote, not a ballpark figure
- No obligation to proceed
Start your enquiry
Do your homework
Check Any Builder Before You Sign
Hiring a builder is a big decision, and you should not have to take our word for anything. These are the UK schemes and registers homeowners use to verify a firm, plus established home improvement companies working in the same trade.
Schemes, registers & official guidance
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TrustMark
The UK’s only government-endorsed quality scheme for work in and around the home.
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FMB — Find a builder
The Federation of Master Builders’ directory of independently inspected building firms.
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Which? Trusted Traders
Traders that have passed Which?’s own assessment process.
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GOV.UK — Building regulations
Which home improvements need building-regulations approval, and how approval works.
Established UK home improvement firms
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Anglian Home Improvements
One of the UK’s largest home improvement companies, manufacturing in Norwich.
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Homecraft Roofing & Building
General building and roofing contractor covering London and the surrounding counties.
Every organisation and company named above is an independent third party. We are not affiliated with, endorsed by, partnered with, or a member of any of them — these links are neutral starting points for your own research. Links open in a new tab.